It took me a while, but I believe this might be one of the few times that a stacked line chart would better serve the purpose. Total throughput is the addition

It took me a while, but I believe this might be one of the few times that a stacked line chart would better serve the purpose. Total throughput is the addition of the 5 "per-connection throughputs." Thus, during the peak, we see ~2 Gb/s for all 5 servers, totaling ~10 Gbps. In the top graph, we see 1-3 Gbps for the 5 servers, totally ~10 Gbps. It would be more clear if a "total throughput" line were added or the author used a stacked line chart, since we're looking at both total throughput and fairness.